01 - Preheat oven to 400°F. Lightly grease a baking dish large enough to hold fillets in a single layer.
02 - Pat tilapia fillets dry with paper towels. Brush both sides with olive oil, then season evenly with salt and black pepper.
03 - Place seasoned fillets in prepared baking dish, ensuring they do not overlap.
04 - In small bowl, whisk together melted butter, lemon juice, lemon zest, and minced garlic until fully combined.
05 - Drizzle lemon butter sauce evenly over fillets. Bake 15-18 minutes until fish flakes easily with fork and is opaque throughout.
06 - Remove from oven, sprinkle with chopped parsley, and serve immediately with lemon wedges if desired.